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package com.sun.enterprise.connectors.system;
import java.util.logging.Logger;
import java.util.logging.Level;
import java.util.Iterator;
import java.util.ArrayList;
import java.util.List;
import com.sun.enterprise.util.SystemPropertyConstants;
import com.sun.enterprise.server.ServerContext;
import com.sun.enterprise.server.ApplicationServer;
import com.sun.logging.LogDomains;
import com.sun.enterprise.config.ConfigContext;
import com.sun.enterprise.config.ConfigException;
import com.sun.enterprise.config.serverbeans.*;
import com.sun.enterprise.connectors.ConnectorRuntimeException;
import com.sun.enterprise.connectors.util.JmsRaUtil;
/**
* Defines an MQ addressList.
*
* @author Binod P.G
*/
public class MQAddressList {
static Logger logger = LogDomains.getLogger(LogDomains.RSR_LOGGER);
private static String myName =
System.getProperty(SystemPropertyConstants.SERVER_NAME);
private List<MQUrl> urlList = new ArrayList<MQUrl>();
private JmsService jmsService = null;
private AppserverClusterViewFromCacheRepository rep = null;
private static String nodeAgentHost = null;
private String targetName = null;
/**
* Create an empty address list
*/
public MQAddressList() throws ConfigException {
this(null);
}
/**
* Use the provided <code>JmsService</code> to create an addresslist
*/
public MQAddressList(JmsService service) throws ConfigException {
//use the server instance this is being run in as the target
this(service, getServerName());
}
/**
* Creates an instance from jmsService and resolves
* values using the provided target name
* @param targetName Represents the target for which the addresslist
* needs to be created
* @param service <code>JmsService</code> instance.
*/
public MQAddressList(JmsService service, String targetName) throws ConfigException {
logFine(" init" + service + "target " + targetName);
this.jmsService = service;
this.targetName = targetName;
}
/**
* Sets up the addresslist.
*/
public void setup() throws ConfigException {
try {
if (isClustered() && (!this.jmsService.getType().equals(ActiveJmsResourceAdapter.REMOTE)) ) {
//setup for LOCAL/EMBEDDED clusters.
logFine("setting up for cluster " + this.targetName);
setupClusterViewFromRepository();
setupForCluster();
} else {
logFine("setting up for SI/DAS " + this.targetName);
if (isAConfig(targetName) || isDAS(targetName)) {
logFine("performing default setup for DAS/remote clusters/PE instance" + targetName);
defaultSetup();
} else {
logFine("configuring for Standalone EE server instance");
//resolve and add.
setupClusterViewFromRepository();
setupForStandaloneServerInstance();
}
}
} catch (ConnectorRuntimeException ce) {
throw new ConfigException(ce);
}
}
private void setupClusterViewFromRepository() throws ConfigException {
ServerContext context = ApplicationServer.getServerContext();
Server server = context.getConfigBean();
String domainurl = context.getServerConfigURL();
rep = new AppserverClusterViewFromCacheRepository(domainurl);
try {
nodeAgentHost = rep.getNodeAgentHostName(server);
logFine("na host" + nodeAgentHost);
} catch (Exception e) {
logger.log(Level.FINE,"Exception while attempting to get nodeagentHost", e.getMessage());
logger.log(Level.FINER, e.getMessage(), e);
}
}
public String getMasterBroker(String clustername) {
String masterbrk = null;
if (rep != null) {
try {
JmsHost mb = rep.getMasterJmsHostInCluster(clustername);
JmsService js = rep.getJmsServiceForMasterBroker
(clustername);
MQUrl url = createUrl(mb, js);
masterbrk = url.toString();
logger.log(Level.FINE, "Master broker obtained is "
+ masterbrk);
}
catch (Exception e) {
logger.log(Level.SEVERE, "Cannot obtain master broker");
logger.log(Level.SEVERE, e.getMessage(), e);
}
}
return masterbrk;
}
private boolean isDAS(String targetName) throws ConfigException {
if (isAConfig(targetName)) {
return false;
}
return ServerHelper.isDAS(getAdminConfigContext(), targetName);
}
private boolean isAConfig(String targetName) throws ConfigException {
return ServerHelper.isAConfig(getAdminConfigContext(), targetName);
}
/**
* Gets the admin config context associated with this server instance
* Usage Notice: Use this only for operations that are performed in DAS
* and requires the admin config context
*/
private ConfigContext getAdminConfigContext() {
return com.sun.enterprise.admin.server.core.AdminService.
getAdminService().getAdminContext().getAdminConfigContext();
}
/**
* Setup addresslist for Standalone server instance in EE
*/
private void setupForStandaloneServerInstance() throws ConfigException {
if (jmsService.getType().equals(ActiveJmsResourceAdapter.REMOTE)) {
logFine("REMOTE Standalone server instance and hence use default setup");
defaultSetup();
} else {
//For LOCAL or EMBEDDED standalone server instances, we need to resolve
//the JMSHost
logFine("LOCAL/EMBEDDED Standalone server instance");
JmsHost host = getResolvedJmsHostForStandaloneServerInstance(this.targetName);
MQUrl url = createUrl(host);
urlList.add(url);
}
}
/**
* Default setup concatanates all JMSHosts in a JMSService to create the address list
*/
private void defaultSetup() throws ConfigException {
logFine("performing defaultsetup");
JmsHost[] hosts = jmsService.getJmsHost();
for (int i=0; i < hosts.length; i++) {
MQUrl url = createUrl(hosts[i]);
urlList.add(url);
}
}
/**
* Setup the address list after calculating the JMS hosts
* belonging to the local appserver cluster members.
* For LOCAL/EMBEDDED clusters the MQ broker corresponding
* to "this" server instance needs to be placed ahead
* of the other brokers of the other siblings in the AS
* cluter to enable sticky connection balancing by MQ.
*/
private void setupForCluster() throws ConfigException {
java.util.Map<String,JmsHost> hostMap =
rep.getResolvedLocalJmsHostsInMyCluster(true);
//First add my jms host.
JmsHost jmsHost = hostMap.get(myName);
MQUrl myUrl = createUrl(jmsHost, nodeAgentHost);
urlList.add(myUrl);
hostMap.remove(myName);
// Add all buddies to URL.
for (JmsHost host : hostMap.values() ) {
MQUrl url = createUrl(host);
urlList.add(url);
}
}
/**
* Creates a String representation of address list from
* array list. In short, it is a comma separated list.
* Actual syntax of an MQ url is inside MQUrl class.
*
* @returns AddressList String
* @see MQUrl
*/
public String toString() {
String s = "";
Iterator it = urlList.iterator();
if (it.hasNext()) {
s = it.next().toString();
}
while (it.hasNext()) {
s = s + "," + it.next().toString();
}
logFine("toString returns :: " + s);
return s;
}
/**
* Creates an instance of MQUrl from JmsHost element in
* the dtd and add it to the addresslist.
*
* @param host An instance of <code>JmsHost</code> object.
*/
public void addMQUrl(JmsHost host) {
MQUrl url = createUrl(host);
urlList.add(url);
}
/**
* Deletes the url represented by the JmsHost from the AddressList.
*
* @param host An instance of <code>JmsHost</code> object.
*/
public void removeMQUrl(JmsHost host) {
MQUrl url = createUrl(host);
urlList.remove(url);
}
/**
* Updates the information about the <code>JmsHost</code>
* in the address list.
*
* @param host An instance of <code>JmsHost</code> object.
*/
public void updateMQUrl(JmsHost host) {
MQUrl url = createUrl(host);
urlList.remove(url);
urlList.add(url);
}
private MQUrl createUrl(JmsHost host) {
return createUrl(host, this.jmsService);
}
private MQUrl createUrl(JmsHost host, String overridedHostName) {
return createUrl(host, this.jmsService, overridedHostName);
}
public static MQUrl createUrl(JmsHost host, JmsService js) {
return createUrl(host, js, null);
}
public static MQUrl createUrl(JmsHost host, JmsService js, String overridedHostName) {
try {
String name = host.getName();
String hostName = host.getHost();
// For LOCAL/EMBEDDED Clustered instances and
// standalone server instances, use
// their nodeagent's hostname as the jms host name.
ServerContext serverContext = ApplicationServer.getServerContext();
Server server = serverContext.getConfigBean();
if (overridedHostName != null && !overridedHostName.trim().equals("")) {
hostName = overridedHostName;
}
String port = host.getPort();
MQUrl url = new MQUrl(name);
url.setHost(hostName);
url.setPort(port);
if (js != null) {
String scheme = js.getMqScheme();
if (scheme != null && !scheme.trim().equals("")) {
url.setScheme(scheme);
}
String service = js.getMqService();
if (service != null && !service.trim().equals("")) {
url.setService(service);
}
}
return url;
} catch (ConfigException ce) {
ce.printStackTrace();
}
return null;
}
//Used to get resolved local JmsHost for a standalone server instance
private JmsHost getResolvedJmsHostForStandaloneServerInstance(
String serverName) throws ConfigException {
logFine(" getresolved " + serverName);
ConfigContext con = getAdminConfigContext();
Server serverInstance = ServerHelper.getServerByName(con, serverName);
logFine("serverinstace " + serverInstance);
JmsHost jmsHost = getResolvedJmsHost(serverInstance);
return jmsHost;
}
private JmsHost getResolvedJmsHost(Server as) throws ConfigException{
logFine("getResolvedJmsHost " + as);
return rep.getResolvedJmsHost(as);
}
private boolean isClustered() throws ConnectorRuntimeException {
return JmsRaUtil.isClustered();
}
private static String getServerName() {
String serverName=System.getProperty(SystemPropertyConstants.SERVER_NAME);
return serverName;
}
private void logFine(String s) {
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE, "MQAddressList :: " + s);
}
}
public int getSize() {
if (this.urlList != null) {
return this.urlList.size();
} else {
return 0;
}
}
}
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